.main {
  width: 100%;
}
.main .main_left {
  width: 90px;
}
.main .main_left ul {
  width: 100%;
}
.main .main_left ul li {
  width: 100%;
  text-align: center;
  height: 50px;
  line-height: 50px;
  border-bottom: 1px solid gray;
  border-right: 1px solid gray;
}
.main .main_left ul li a {
  color: black;
}
.main .main_right {
  overflow: hidden;
  /* 顶部 左右 底部为0 */
  padding: 10px 10px 0;
}
.main .main_right .right_banner {
  display: block;
  width: 100%;
}
.main .main_right .right_banner img {
  display: block;
  width: 100%;
}
.main .main_right h3 {
  margin-top: 10px;
  font-size: 12px;
}
.main .main_right ul {
  width: 100%;
  padding-top: 10px;
}
.clearfix {
  content: '';
  display: block;
  line-height: 0;
  height: 0;
  visibility: hidden;
  clear: both;
}
ul {
  content: '';
  display: block;
  line-height: 0;
  height: 0;
  visibility: hidden;
  clear: both;
}
ul li {
  width: 100%;
  height: 60px;
}
ul li.current {
  color: red;
}
ul li::before {
  content: '';
  display: block;
  line-height: 0;
  height: 0;
  visibility: hidden;
  clear: both;
}
